/*
 * Copyright 2006 Robert Burrell Donkin
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ 
package rat.engine;

import java.util.Stack;

/**
 * Engine does work.
 */
public class Engine {

	final Stack work;
	
	public Engine() {
		work = new Stack();
	}
	
	public void addWork(IWorker worker) {
		work.push(worker);
	}
	
	public boolean work() {
		return !work.isEmpty();
	}
	
	public void doWork() {
		IWorker worker = (IWorker) work.pop();
		worker.work();
	}
	
	public void doAllWork() {
		while(work()) {
			doWork();
		}
	}
}
